//
// This file is part of Kepka,
// an unofficial desktop version of Telegram messaging app,
// see https://github.com/procxx/kepka
//
// Kepka is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// It is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// In addition, as a special exception, the copyright holders give permission
// to link the code of portions of this program with the OpenSSL library.
//
// Full license: https://github.com/procxx/kepka/blob/master/LICENSE
// Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
// Copyright (c) 2017- Kepka Contributors, https://github.com/procxx
//
#pragma once

#include <QPaintEvent>
#include <gsl/gsl>

#include "ui/twidget.h"

#include "base/observer.h"

class PeerData;

namespace Profile {

class SectionMemento;

class BlockWidget : public TWidget, protected base::Subscriber {
	Q_OBJECT

public:
	BlockWidget(QWidget *parent, PeerData *peer, const QString &title);

	virtual void showFinished() {}

	virtual void saveState(gsl::not_null<SectionMemento *> memento) {}
	virtual void restoreState(gsl::not_null<SectionMemento *> memento) {}

protected:
	void paintEvent(QPaintEvent *e) override;
	virtual void paintContents(Painter &p) {}

	// Where does the block content start (after the title).
	int contentTop() const;

	// Resizes content and counts natural widget height for the desired width.
	int resizeGetHeight(int newWidth) override = 0;

	void contentSizeUpdated() {
		resizeToWidth(width());
		emit heightUpdated();
	}

	PeerData *peer() const {
		return _peer;
	}

	bool emptyTitle() const {
		return _title.isEmpty();
	}

private:
	void paintTitle(Painter &p);

	PeerData *_peer;
	QString _title;
};

int defaultOutlineButtonLeft();

} // namespace Profile